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Updated: Jul 14, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
[Causes of preterm delivery among adolescent mothers]
Héctor Oviedo Cruz1, Josefina Lira Plascencia, Ayumi Ito Nakashimada
1Coordinación para la Atención de la Paciente Adolescente, Instituto Nacional de Perinatología Isidro Espinosa de los Reyes, colonia Lomas Virreyes, DF México. hoviedo77@hotmail.com
Objective:
To describe the proportion of preterm delivery at pregnant adolescents clinic and their maternal, obstetric and fetal conditions other than spontaneous labor.
Patients And Method:
Descriptive inside a cohort of consecutive cases. Preterm was defined from 20 to 36 full weeks. Maternal, obstetric and fetal conditions were defined if directly caused preterm labor or elective interruption; it was differentiated from spontaneous preterm labor.
Results:
Preterm delivery rate was 10.8% (252/2326): 0.8% from 20 to 27 weeks (19/2326), 3.3% from 28 to 33 weeks (77/2326) and 6.7% from 34 to 36 weeks (156/2326). Spontaneous preterm labor presented in 39.3% (99/252); main conditions found were: rupture of the membranes 18.7% (47/252), preeclampsia-eclampsia 10.3% (26/252), twin pregnancy 10.3% (26/252), intrauterine growth restriction 5.6% (14/252) and congenital defects 5.6% (14/252). They were classified as: obstetric-type 34.9% (887252), fetal 25.4% (64/252) and maternal 0.4% (1/252). There was a 40.5% rate of vaginal delivery (102/252), with the use of forceps in 1 out of 5.
Conclusions:
At purpose-built clinics using evidence-based and problem oriented interventions, that are individually adapted and continuously up-dated, a non-risk comparable preterm delivery rate can be achieved at gestational ages with better neonatal prognosis.
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